Ok Here are my finding on this subject. If you jump on or by a top corner of a square it thinks you landed on the top of it making it think you did a normal jump, if you do not hit the jump button right as you hit the corner you will fall like you hit the side.
So on marathon the jump pad launches you up just enough to touch the corner, if you dont hit the jump button you will fall but if you do it thinks you landed on the top since you hit a corner and you can get over the zig-zag area.
Some lvls you can use this to jump over extra obsicals, even if you think your going to jump past a corner and you touch it you can use it again to jump one more time.
As for the random jumping in mid air thats beyond me. I have no clue.
yes actually u can double jump its not lagging u do it when jumping toward a corner, u have to keep on trying to jump while in the air near a corner then it will double jump, its kinfd of hard to explain
At the Jumper/trampoline, you hold jump for a high jump, and use flow. I'll give more details later once I'm able to perfect that double jump.
After you got the high jump, keep pressing up to double jump that wall. If the jump fails, tap right at the low part of the wall to go through the saws. It takes a lot of practice though. Sorry for the late follow-up. :P